Sonifex CM-LUR1 | Balanced to Unbalanced Audio Converter

This product allows the connection of a stereo balanced line input via RJ45 with StudioHub+™ pinout to a stereo unbalanced output on stereo phono connectors. It is transformer balanced, with a 2:1 ratio, so 6dB of attenuation is added to the input to help interface with the lower signal levels associated with consumer outputs. This unit is a passive version of the RB-LU4 (though only 1 x stereo channel), and provides you with an alternative to having to interface a balanced output to an unbalanced input via specialist cables (either by shorting the non-phase to ground or disconnecting it). It is particularly useful where a shared balanced audio feed needs interfacing to an unbalanced input on one or more pieces of equipment. Using a CM-LUR1 or CM-LUX1 galvanically isolates the audio, allowing you to connect via phono cables to an unbalanced input without compromising the distributed feed. The stereo analogue input is on a female RJ45 connector with the following standard StudioHub+™ pin assignments:

Product Features

• Stereo balanced line input via RJ45 with StudioHub+™ pinout.
• Stereo unbalanced output on stereo phono connectors.
• Transformer-balanced input with 2:1 ratio.

Typical Applications

Creates a connection of a stereo balanced line input via RJ45 with StudioHub+™ pinout to a stereo unbalanced output on stereo phono connectors.

Product Category

Passive Converters

Technical Specifications

Audio Specification

• Input/Output Level Ratio: 02:01
• Input/Output Impedance Ratio: 04:01
• Max Input Level: +28dBu
• Max Output Level: +22dBu
• Frequency Response: 20Hz to 20kHz, +0/-0.5dB
• Noise: <-115dBu A-wgtd
• Distortion Ref +8dBu (Output): <0.01%
• Common Mode Rejection: >80dB

Connections

• Balanced Line Input: 1 x RJ45 female StudioHub+™ pinout
• Unbalanced Line Output: 2 x RCA phono connectors

Equipment Type

• CM-LUR1: Balanced to unbalanced audio converter, RJ45 input

Physical Specification

• Dimensions (Raw): 7.7cm (W) x 8.3cm (D) x 4.2cm (H)
• Dimensions (Raw): 3.0” (W) x 3.3” (D) x 1.7” (H)
• Weight: Nett: 0.22kg Gross: 0.33kg
• Weight: Nett: 0.49lbs Gross: 0.73lbs

Support and Downloads

Handbooks & Guides

• CM-LUR1 Handbook

Brochures

• Click to visit the brochures page.

Declarations

• Click to visit the declarations page.

Related Products

• CM-LUX1 Balanced to Unbalanced Audio Converter
• CM-MNT1 Desk Mount Panel
• CM-ULR1 Unbalanced to Balanced Audio Converter
• CM-ULX1 Unbalanced to Balanced Audio Converter

Official Links

• Official Product Page